Use ContainsValue() instead of std::find() in chromecast/

chromecast/media/audio/cast_audio_mixer.cc

Index: chromecast/media/audio/cast_audio_mixer.cc
diff --git a/chromecast/media/audio/cast_audio_mixer.cc b/chromecast/media/audio/cast_audio_mixer.cc
index a7ed6f5bc1682434c460ad263ea0374ca1d52f0b..d1d3520ec9e904be8f934bb6031cea36c8199e45 100644
--- a/chromecast/media/audio/cast_audio_mixer.cc
+++ b/chromecast/media/audio/cast_audio_mixer.cc
@@ -7,6 +7,7 @@
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
+#include "base/stl_util.h"
 #include "chromecast/media/audio/cast_audio_manager.h"
 #include "chromecast/media/audio/cast_audio_output_stream.h"
 #include "media/base/audio_timestamp_helper.h"
@@ -201,8 +202,7 @@ CastAudioMixer::~CastAudioMixer() {}
 
 bool CastAudioMixer::Register(MixerProxyStream* proxy_stream) {
   DCHECK_CALLED_ON_VALID_THREAD(audio_thread_checker_);
-  DCHECK(std::find(proxy_streams_.begin(), proxy_streams_.end(),
-                   proxy_stream) == proxy_streams_.end());
+  DCHECK(!base::ContainsValue(proxy_streams_, proxy_stream));
 
   // Do not allow opening new streams while in error state.
   if (error_)
@@ -227,8 +227,7 @@ bool CastAudioMixer::Register(MixerProxyStream* proxy_stream) {
 
 void CastAudioMixer::Unregister(MixerProxyStream* proxy_stream) {
   DCHECK_CALLED_ON_VALID_THREAD(audio_thread_checker_);
-  DCHECK(std::find(proxy_streams_.begin(), proxy_streams_.end(),
-                   proxy_stream) != proxy_streams_.end());
+  DCHECK(base::ContainsValue(proxy_streams_, proxy_stream));
 
   proxy_streams_.erase(proxy_stream);